I wasn't talking about the WoL toppling an Empire. Quite the opposite. I was talking about the WoL trying to help save the core of the empire from individuals inside it trying to seize power for themselves, even at the risk of the empires demise. I am not saying they should neuter the empire either. Moderation just means not being so set on the whole genocide, conquer everything, brutal oppression thing.
The issue I have is that for an outside force to be a serious threat to the Empire it must be huge and powerful. In Stormblood we will be fighting the Empire and costing them a couple of provinces probably but we aren't going to come anywhere close to actually toppling the Empire. They are the powerhouse of the world. As it is they would only have one expansion cycle to introduce this threat and there isn't so much as a hint of such a power that could rise up to present a real threat to the empire so far except if maybe the WoL themselves rallied the rest of the world against them.
I think fighting in a expansion of political intrigue could be a really interesting way to look into the heart of the Garlean culture, why it is the way it is and what is both the good and the bad of the Garleans. I think that would be far more interesting than Varis sending us off to fight in a war against some threat that has appeared out of no where. Again, exactly why would he need our help? Unless he is fighting an army of Primals, the WoL is really only one particularly kick ass soldier. He has Legions.